// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_
#define UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_

#include <limits.h>

namespace base {
namespace win {

    // Windows accessibility (MSAA) notifications are posted on an
    // accessible object using its owning HWND and a long integer child id.
    // Positive child ids can be used to enumerate the children of an object,
    // so in Chromium we use only negative values to represent ids of specific
    // accessible objects.
    //
    // Chromium currently has two separate systems that use accessibility ids:
    // * views (ui/views/accessibility), and
    // * web (content/browser/accessibility)
    //
    // These constants ensure they use non-overlapping id ranges.

    const long kFirstViewsAccessibilityId = -1;
    const long kLastViewsAccessibilityId = -999;
    const long kFirstBrowserAccessibilityManagerAccessibilityId = -1000;
    const long kLastBrowserAccessibilityManagerAccessibilityId = INT_MIN;

} // win
} // base

#endif // UI_BASE_WIN_ACCESSIBILITY_IDS_WIN_H_
